Yellowstone National Park

Spring:  April to Early-June 
Summer: Mid-June to Early-September 
Autumn:  Mid-September to October 
Winter:  November to March 

7 Day Pass:
$35 per Vehicle
$20 Per Person
$30 Per Motorcycle

24/7 (Some road closures in winter)

South: Jackson Hole Airport
West: Yellowstone Airport
North: Bozeman Yellowstone Airport, Billings Logan Airport
Northeast: Yellowstone Regional Airport

2,219,791 Acres

First National Park in the World
UNESCO World Heritage Site
Geothermal Features & Wild Animals (especially Bison)
Top Travel Destination in North America

Spring or Autumn
Avoid Summer due to large crowds
Winter is cold with average temperatures ranging from 0 to 20F (-20C to -5°C)

2 hour drive from Jackson (WY) or Bozeman or Idaho Falls
Adjacent to Tourist Towns Gardiner (MT) and West Yellowstone (Town) and Victor (ID)

Winding Road: Mostly Mild
Bumpy Road: Mild

None to Mild

https://www.nps.gov/yell/index.htm

Yellowstone National Park, USA

https://www.theguidemaster.com/articles/travel-hacks-for-a-spectacular-yellowstone-road-trip-on-a-cheap-budget

Adjacent to Grand Teton National Park

https://www.yellowstonepark.com/park/overview-map-yellowstone